/*
    变量练习
*/
#include <stdio.h>
int main() {
    int num = 10;
    printf ("%d ", num);
    num = num - 1;
    printf ("%d ", num);
    num = num - 1;
    printf ("%d ", num);
    num = num - 1;
    printf ("%d ", num);
    num = num - 1;
    printf ("%d\n", num);
    return 0;
}
